True Symmetry Cables

Print

It’s generally known that any audio cable — a digital one, an acoustic one, a speaker one, or an interconnect — has its effect on the way the system sounds. A great number of cables are manufactured using various technologies and materials and every designer tries to persuade customers that only his solution yields positive results.

Experimenting with different cables a music lover usually notices that some of them sound differently when connected in an ‘opposite’ direction. Many a lance was broken over the problem of defining the ‘correct’ cable direction but the common ground has never been reached for it seems that there’s no such thing as the ‘correct’ direction to connect a cable (both directions seem to be equivalent).

Now let’s discuss conductor manufacturing technology. To obtain the necessary thickness the conductor is drawn through a calibrated orifice in a special matrix called a die. The resulting pressure and temperature force the wire structure to change: metal is deformed and an additional internal strain arises.

Consequently anisotropy turns up: resistivity, skin effect and other parameters become different for each direction. This directivity in its turn causes asymmetry of properties when the wire conducts the positive and the negative half-wave of an electrical signal. This asymmetry leads to distortions (the so called semiconductor effect) which are especially harmful for a low-amplitude signal: it either changes its form or stops being conducted altogether.

To alleviate internal strains a conductor is subjected either to heating (annealing) or refrigerating (cryogenic treatment). But this temperature treatment doesn’t eliminate the directivity effect entirely.

Let’s also note that in most cases the manufacturing technology of a multi-stranded conductor either doesn’t affect this directivity at all or even increases it. By the way, one of the reasons why each cable has its own ‘sound’ is the degree of conductors’ directivity.

What can be done to eliminate the negative impact of directivity on the signal transfer? The solution is to use the same wire connected in both directions simultaneously i.e. to connect wires with ‘opposite’ directivity in parallel.

This is the way to obtain a ‘symmetrized’ electric conductor with identical properties for transferring the signal’s positive and negative half-wave. In other words this is the way to produce a conductor without the abovementioned directivity effect. A cable made of such conductors will be naturally 'symmetrized’. It won’t be sensitive to the direction it’s connected to an audio device.

Moreover, for transformers, chokes, coils of various kinds, wire capacitors i.e. for any component working with alternate current the impact of directivity on the properties of an electrical circuit is a negative one.  Besides, some of the circuit’s elements (for example a coil) are susceptible to cross-interference of particular areas in their winding. Theusageofa 'symmetrized’ wireforacoillowersthisinterferenceconsiderably.

That’s why transformer windings, inductance coils and even the connecting lines in a circuit must be made of a 'symmetrized’ wire.

The directivity effect is certainly not the only factor deteriorating cable quality. And elimination of this factor by means of 'symmetrizing’ isn’t an ideal solution. Nothingisidealinourworld! But by 'symmetrizing’ all conductors in a circuit we can achieve a really positive result which can be heard while reproducing sound via your audio system.

Another important problem is the choice of material for a cable conductor. Having tried probably all existing materials we concluded that the best one for a cable is copper litz wire (litzendraht), a multi-strand wire, each strand coated with isolating lacquer. One of litz wire’s main advantages is lower impedance on high frequencies (compared to regular wire). 

We also found out that litz wire is suitable for any type of cable — a digital one, an acoustic one, a speaker one, a power one or an interconnect. Only the structure of each cable type is different, but the material remains the same.

So the customer can use the same litz wire material for the complete audio system. We think that few people pay attention to the way of different materials interact while conducting an audio signal. Meanwhile each material has its own unmistakable sound character which can’t be changed or completely eliminated by engineering means. Used in a single audio signal flow, cables made from different materials often have an unpredictable effect on the sound of a complete system. To avoid this effect a customer has to use for the system conductors made from one and the same thoroughly selected material.  

In all Wagner Audio Lab devices and cables incl. acoustic ones exclusively True Symmetry 'symmetrized’ litze wire is used.

It’s important to note that True Symmetry cables provide for the simplest and the quickest way to update any audio system.